Seam-trimmer and edge-binder for sewing-machines.



W. R. ABBROROMBIE. SEAM TRIMMER AND EDGE BINDER FOR SEWING MACHINES.

APPLICATION FILED APR. 6, 1910.

Patented Jan. 30, 1912.

2 SHEET3SHEET 1.

7 I INVENTOR I/QJ/AA/ 1?. ABaxwoMa/Z WITNESSES:

4 Arromwsk W. R. ABBROROMBIE.

SEAM TRIMMER AND EDGE BINDER FOR SEWING MACHINES.

Patented Jan. 30, 1912.

' t V A?PLIGATION FILED APR. 6, 1910. LGimQQQO 2 SHEETSSHEET 2.

ATTORHEY unrrnn ems.

VIILLIAM. Bl. ABEBCROTYEBLE, GE CQNNECTICUT, ASSTLGNOR TOTHE SINGER. MANUFACTURING CGMPANY, A CGBPORATIQN OF NEW JERSEY.

SEAM-TRIMMER AND EDGE-BINDER FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented Jan. 30, 1912.

Application filed April 6, 1910. Serial No. 553,766..

To aZZ whom it may con-cm:

Be it known that 1, WILLIAM Antan- -ononn1n, a citizen of the United States, re-

"cation of a binding to the trimmed edges of the materials.

When applying triimning devices to sewing machines which do not employ binding mechanism, the only adjustment of the cutter necessary to change the relationship of the line of needle actuation with respect to the line of cutter actuation is in a direction transverse to the line of the seam; but when the stitch-forming and trimming mechanism is employed in connection with means for applying bindings of different widths to the -trimmed edges of the materials, it is essen tial that the cutter be capable of adjustment in directions transverse to each other; and to. .efi'cct such adjustment by the employment of conveniently-manipulated, self-reg istering means is one of the objects ot' this invention.

It is essential to the utility of a sewing machine trimming device intended for general commercial use, that it be capable of meeting the requirements of productions of distinctly unlike character, such as saddle and harness materials as compared with fabrics of delicate texture, and to obtain this result it is important that the cutter be mounted and actuated so that it will not spring or yield out of its normal cutting plane, the accomplishment of this result being a further object of this invention.

The invention further contemplates an improved construction of parts and their coacting combinations, as will be hereinafter fully pointed out. I

- In the accompanying drawings illustrating the invention, in the several figures of which like parts are similarly designated, Fhgure 1 1s a rear side elevation, in perspective, of a sewing machine equipped with the l improved mechanism. Fig. 2 is a plan view of that portion of the bed-plate of the sewing machine underlying the bracket arm, together with the throat-platatront slideplate, tension-plate and adjustably-secured cutter-carrying lever hinge-plate, the latter having hinged to it a portion of the cuttercarrying lever. Fig. 3 is an underside view of the cutter carrying lever hinge plate shown in Fig. 2, including the hinged portion of said cutter-carrying lever. Fig. 4: is a perspective view of the front end portion of the cutter, cutter-carrying lever, and the cutter-actuating mechanism located below the bracket arm. Fig. '5 is a perspective view of the binder head. Fig. 6 is a perspective view of the presser-foot and resser-foot bracket. Fig. 7 is a perspective view of the scroll guide for directing the waste fabric below the sewing machine bed-plate.

The improved mechanism is herein shown as combined with one form of sewing machine comprising well-understood clothtceding, stitch-forming and cutter-carriercontrolling mechanism, the same being represented by U. S. Patent to W. R. Abercrombie, No. 849,347, dated April 2, 1907, to which reference may be had.

1 represents the bed-plate of the sewing machine, 2 the bracket arm, 3 the arm stand ard, 4- the head or free end of the bracket arm, 5 the hand or belt pulley, 6 the needle, 7 the needle-carrying bar, 8 the presser-carcloth-presser foot bracket, 11 the presser-bar lifter, 12 the teed-dog and 13 the front slideplate.

1% represents the cutter-actuating bar-,1?) the cutter-actuating rock-shaft, 16 the cutter-actuating rock-shaft lever carrying a bolt. 1? for effecting operative relationship with said cutter-actuating bar at-the will of the operator, and 18 is a cutter-actuating lever carried by said rock-shaft and having its inner end forked and in operative relationship with a suitable eccentric carried by the hub 19 for giving to said rock-shaft oscillating movements, said hub being secated by the arrcw S.

rying bar, 5) the cloth-presser toot,'10 the cured upon the commonly-employ d needle- The previously referred to parts are the same in construction and operation as those employed in the patent above referred to, specific reference to these parts being herein made to more clearly point out the application of the present invention to one form plate 26, the latter'being secured to the bed-i The forward or.

plate 1 by screws27, 27. delivery end of the binder head 23 fits into the depressed portion 28 of the throat-plate 29, said throat-plate being held upon the bedplate 1 by screws 30, 30.

' 31 represents the ledger trimmer blade or plate secured by screws 32 to the throatplate, the cutting edge 33 of said ledger plate overhanging the opening 3% formed in the bed-plate.

35 represents an adjustably-mounted scroll-guide secured by a screw 36 which passes through a slot 37 formed in the base of said guide and is threaded into the tension-plate 26, a pin 38 in connection with the screw 36 acting to control the adjustment of said scrollguide in an oblique direction with respect to the line of seam formation, for a purpose later to be explained.

The cutter-carrying lever hinge-plate 39 is adjustably secured to the bed-plate of the sewing machine by a bolt 40 which passes through a slot 41 and is threaded into said bed-plate, a depressed guide-way 42 formed in the underside of said hinge-plate coacting with a raised guide-way 43 carried by said bed-plate to control the adjustment of said hinge-plate in an oblique direction with respect to the line of the seam, for the same purpose as that for which the guide 35 is adjusted in a like direction. The cuttercarrying lever 44 is hinged at 4 5 to the plate 89 and carries at its forward end the trimmer blade or cutter 46 secured to said lever by screw 47, the threaded end only of which is shown (see Fig. 4).

48 represents a link bracket provided with a raised guide-way 49 and a depending ear 50 into which latter is threaded a bolt 51 carrying a link 52, the lower end of said link being engaged with a stud bolt 53 which is threaded into the forward end of the cutter-carrying lever 44. The raised guide-way 49 coacts with a depressed guideway 54 formed in the lower end of the cutter-actuating bar 14 to permit of the adjustment of said bracket in a direction transverse to the length'of said cutter-actuating bar, screws 55 (the threaded ends only of which are shown) passing through the elongated slot 56 and threaded into said bar 14 acting to hold said bracket in its adjusted position.

The delivery end 57 of the binder head 23 is provided with a concaved notch 58 for guiding the binding in a direction transverse to the convex guide-way 59 and. in line with the feed of the material, said free end being givenan angle of about 45 degrees to said convex guide-way and to the line of the feed, as is common to binders of this class.

When using an edge trimmer in connectron with a binder head such as is llGI'QlII' will be readii y understood that while the use of the scroll-guide is desirable, it not res-- sential to the practical operation of the invention.

in the device of the application, as in the construction of trimming devices generaliy, interchangeable ledger blades are provided to meet the required adjustments of the cutter.

To overcome the tendency of the butter to spring or yield out of line with its normal cutting plane, the cutter carrier is fulcrumed in substantially the same horizontal plane asthe plane of the cutting edge of the ledger blade and is given oscillating move ments in a vertical plane at substantially right angles to the trimming line, and its constantly-related actuating mechanism is arranged in a verticalp lane corresponding substantially with thewvertical plane of the cutter when the latter isactuated to sever the material.

Claims 2- v 1. In a trimming and binding mechanism for sewing machines, a binder head having its delivery end formed at an oblique angle fl at if to the direction of its length, a trimmer blade, a ledger blade, and means for actuating said trimmer blade including an adjustably-mounted trimmer blade carrier having a fixed line-of adjustinent in a direction corresponding substantially with the angle given to the delivery end of said binder head.

2. In a trimming and binding mechanism for sewing machines, a binder head provided with a concaved and a convexed braidguiding surface and having, its delivery end formed at an oblique angle of ELPPLOKILT mately 45 degrees to'said 'uiding surfiices, a trimmer blade, a ledger lade and means for actuating said trimmer blade including an adjustably-mounted trimmer blade carrier having a fixed line of J adjustment in a binder head.

3. In a trimming and binding mechanism for sewing machines, a binder head having its delivery end formed at an oblique angle to the direction of its length, a trimmer blade, a ledger blade and an adjustablymouzited trimmer blade carrier having a fixed line of adjustment in a direction corresponding substantially with the angle given 'to the delivery end of said binder head, in combination with means for actuating said carrier including constantly-related coacting connections having movements in V substantially the same vertical vplane as the hen the latter is actuated trimmer blade W to sever the material.

4. In a trimming and binding mechanism for sewing machines, a binder head having its delivery end formed at'an angle to the direction of its length, a trimmer blade, a ledger blade, and means for actuating said trimmer blade including an adjustablyer hinged. to the bed-plate of the sewing machine and having a .fixed line of adjustment in a direction corresponding substantially with the angle given to the delivery end of said mounted trimmer blade carri binder. head.

5, In a trimming and binding mechanism for sewing machines, a binder head having its delivery end formed at an angle to the direction of its length, a trimmer blade, a ledger blade and means for actuating said trimmer blade including an adjustablymounted trimmer blade carrier hinged to the bed-plate of the sewing machine and having oscillating movements in a vertical right angles to the trimming line and having a fixed line of adjustment in a direction corresponding substantially with the angle given to the delivplane at substantially ery end of said binder head.

a trimming and binding mechanism for sewing machines, a binder head having its delivery end formed at an angle to the direction of its length, a trimmer blade, a

ledger blade and means for actuatin =trimmer blade including, an ad' mounted trimmer blade carrier hi g said ustablynged to ably the bed-plate of the sewing machine and having oscillating movements a vertical plane at substantially right angles "to the trimming line and having a fixed lineof adjustmentin a direction corresponding substantially with the angle given to the delivery end of said binder head, in combination with means for actuating said carrier including constantly-related coacting connections mounted to move in substantially the same vertical plane asthe trimmer blade when the latter is actuated to sever the material.

7. In a trimming and binding mechanism for sewing machmes,a binder head having its delivery end formed at an angle to the 'direction of its length, a trimmer blade, a ledger blade and an adjustably-mounted trimmer blade carrier having a fixed; line of adjustment in a direction corresponding substantially with the angle given to the delivery end of said binder head, in combi nation with means for actuating said carrier including a constantly-related connection having vertical movements in the head of the bracket armand carrying at its lower end a link bracket, and a link for connecting said bracket with said trimmer blade carrier.

8. In a trimming and binding mechanism for sewing machines, a binder head, a trimmer blade, a ledger blade, and an adjust -mounted trimmer blade carrier having its fulcrum in substantially the same hori zontal plane, as the cutting edge of the ledger blade, and having oscillating movements in a vertical plane transverse to the line of the scam, in combination with means for actuating said carrier including constantly-related coacting connections having movements in substantially the same vertical plane as the trimmer blade when the latter is actuated to sever the material. y

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

WILLIAM R. ABEROROMBIE.

THOMAS CAMPBELL. 

